No. We used Reggie's - regtourbz.com. He was very good and we felt we got a lot more cave tubing for the money. There are several cave tubing tour operators in Belize. Reggie has been doing it for a long time.
About halfway through our float he pointed out where the ship's tour put into the river. I definitely felt like I got my money's worth.

several yrs ago we were in Belize the day after a cave tubing death, the water was very very swift and the lady got knocked out when the current pushed her into the cave wall, no one noticed her face fall into the water and she drowned. I would stick company that people are very satisfied with.